How I repeat my material?
A Color Ramp Node is the most straight forward way I know of to achieve your desired effect.

Example Node Setup:


In the Color Ramp Node select the + button to add more markers. Click &amp; drag to place. Position number &amp; arrows can also be used for more precision. Placing them further apart will increase the size of the transitional gradient (better known as 'falloff').

Note: You can do away with the Gradient Texture node all together &amp; simply use the Color Ramp Node for your gradient as well.

Note 2: You also don't require two separate emission shaders. Using a Mix RGB node accomplishes the same effect with, slightly, fewer resources. Unless you need or want separate strength values. I'd recommend the preceding setup.

Note 3: For more information on the Color Ramp Node visit their official manual page here.